India - PO Matched Invoice Entry

Hi,

The current invoice entry for India Invoice is as follows.

1) Enter the invoice details into Invoice form based on the invoice received

2) Enter the purchase order number at the PO number field

3) Click on the invoice "Match” button to match to PO

4) Offset PO line

Enter a second line and delete the PO number.

Enter negative amount of the PO line and enter the same distribution Account

5) Enter non-PO line

Enter a third line and delete the PO number.

Enter the same amount of the PO line and enter the same distribution Account.

6) Calculate TDS on 3rd Line .

Any idea why it has been setup like this?